SpiceWorks.com - Free IT desktop

Spiceworks is a free, easy-to-use IT desktop tool that lets IT administrators inventory and monitor networks of up to 250 devices. The application is best for small businesses.

One downside is that there are some ads running down the side of its browser-based interface. Spiceworks´ tool can be used for creating and updating an inventory of end-point devices such as printers and network nodes. It includes a basic help-desk component and gives you access to a helpful user community. The web server can be installed on any PC simply by telling it which port to bind to (80 by default) and where it should put itself on the hard drive; from then on, you interact with it via your browser. You can also install it on a server if that suits you better.